1 inch per minute (in/min) = 0.423333333 millimeter per second (mm/s).
Inch Per Minute (in/min) is a unit of Speed used in Standard system.
Millimeter Per Second (mm/s) is a unit of Speed used in Metric system.
Inch per minute also can be marked as inch/minute. Millimeters per second also can be marked as mm/s and Millimetres per second(alternative British English spelling in UK).